[Hereditary neuropathies].

BACKGROUND

Hereditary neuropathies constitute a heterogeneous group of diseases that make up a significant proportion of peripheral nerve disease cases.

MATERIAL AND METHODS

The paper is based on a review of recent literature, including searches on Medline, and our own clinical and research experience.

RESULTS

Charcot-Marie-Tooth disease, itself a heterogeneous disease, is the most common hereditary neuropathy. Several variants of neuropathy are associated with hereditary metabolic disorders. Diagnostic methods include nerve conduction velocity studies and electromyography, quantitative sensory testing, molecular genetic diagnostic testing, and in selected cases processing of nerve biopsies and skin biopsies for determination of epidermal nerve fibre densities.

INTERPRETATION

A thorough family history of neuropathic symptoms and signs, and preferably clinical and electrophysiological examination of relatives is essential for the diagnosis of hereditary neuropathy. Molecular genetic analysis is promising for accurate classification of these diseases. Nerve biopsy is only helpful in selected cases.